STUDY ON IMPACT VELOCITY OF TSUNAMI DEBRIS IN CONSIDERATION OF SURROUNDING FLOW

Abstract

 In this study, the simplified motion calculation method of the impact velocity is proposed for tsunami debris. Additionally, the hydrodynamic characteristic of tsunami debris and the surrounding flow characteristic are investigated by CFD for the calculation method. From these results, estimation models of them are proposed. The calculation result of the proposed motion calculation method showed that the impact velocity become smaller than the flow velocity of tsunami. Furthermore, the result showed that the influence of hydrodynamic coefficient and surrounding flow characteristic, on the impact velocity.